Monessen Hearth manual Floor Protection, 624WBPF Woodburning Fireplace, 53D9052

FLOOR PROTECTION 624WBPF Woodburning Fireplace

If this fireplace is installed on a combustible floor, the floor area 16 inches in front of, and 8 inches ei- ther side of the fireplace opening must be protected by an insulating noncombustible hearth extension. Figures 6 & 7

With either type hearth extension minor shifting of the supporting floor or expansion and contraction may eventually cause a crack to develop between the hearth extension and the face of the fireplace. To help prevent the crack from developing, the hearth extension materials must be firmly fastened in place. Wall ties should be screwed to the face of the fireplace and imbedded in the mortar joints of brick, stone, or other non-combustible materials. The metal safety strip packed with the fireplace must be placed beneath the fireplace and extended under the hearth extension or into a mortar joint of the hearth extension as shown by Figure 8. In the event a crack does eventually develop, the metal safety strip will serve as a barrier to prevent sparks or embers from falling from the fireplace onto combustible flooring materials.

NOTE: If noncombustible hearth extension materials are to be placed at or below the level of the bottom of the fireplace, insu- lation board is not required.

If the fireplace is recessed into the floor or the hearth is elevat- ed with combustible materials, an MHSC H1652 hearth exten- sion kit or equivalent must be used for additional protection.

Figure 6							36” Min.
Hearth		Glass			8”
Extension				Door			Hearth
Wall Shield							Extension
Installed Flush	DoorGlass			Glass		16”
with Wall
Board
(16” x 36” x
1/2” thick Non-							Wall Shield on top of
combustible
							Wall Board
Board with ‘R’
							(Model WS or Equiva-
Factor of 43 or
							lent)
Less)
								FP2349
		1/2” Air Space
Finished Combustible
Wall Clearance from			29”
Fireplace Screen Open-
		Min.
ing

Hearth	Glass	8”
Extension			Hearth
			Extension
	Glass Door	Glass Door	Installation Minimums
			with No Wall Shields
Figure 7

4”	FP2350
Min.

2”

	Metal Safety
	Strip
2”	(2 Required)

Figure 8

FP2183

Special ‘Z’

Metal Safety

2” Strip

(2 Required)

53D9052